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A material has relative permittivity εr and relative permeability μr. For a diamagnetic substance, which pair of values is physically permissible?

1. εr = 0.5, μr = 1.5
2. εr = 1.5, μr = 0.5
3. εr = 0.5, μr = 0.5
4. εr = 1.5, μr = 1.5

Correct answer: εr = 1.5, μr = 0.5

Solution

The correct option indicates that the relative permittivity can be greater than 1 while the relative permeability is less than 1, which is consistent with the properties of diamagnetic materials that exhibit weak repulsion to magnetic fields and can have varying electric properties.

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